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Diffstat (limited to 'include/asm-arm/io.h')
-rw-r--r-- | include/asm-arm/io.h | 286 |
1 files changed, 286 insertions, 0 deletions
diff --git a/include/asm-arm/io.h b/include/asm-arm/io.h new file mode 100644 index 000000000000..69bc7a3e8160 --- /dev/null +++ b/include/asm-arm/io.h | |||
@@ -0,0 +1,286 @@ | |||
1 | /* | ||
2 | * linux/include/asm-arm/io.h | ||
3 | * | ||
4 | * Copyright (C) 1996-2000 Russell King | ||
5 | * | ||
6 | * This program is free software; you can redistribute it and/or modify | ||
7 | * it under the terms of the GNU General Public License version 2 as | ||
8 | * published by the Free Software Foundation. | ||
9 | * | ||
10 | * Modifications: | ||
11 | * 16-Sep-1996 RMK Inlined the inx/outx functions & optimised for both | ||
12 | * constant addresses and variable addresses. | ||
13 | * 04-Dec-1997 RMK Moved a lot of this stuff to the new architecture | ||
14 | * specific IO header files. | ||
15 | * 27-Mar-1999 PJB Second parameter of memcpy_toio is const.. | ||
16 | * 04-Apr-1999 PJB Added check_signature. | ||
17 | * 12-Dec-1999 RMK More cleanups | ||
18 | * 18-Jun-2000 RMK Removed virt_to_* and friends definitions | ||
19 | * 05-Oct-2004 BJD Moved memory string functions to use void __iomem | ||
20 | */ | ||
21 | #ifndef __ASM_ARM_IO_H | ||
22 | #define __ASM_ARM_IO_H | ||
23 | |||
24 | #ifdef __KERNEL__ | ||
25 | |||
26 | #include <linux/types.h> | ||
27 | #include <asm/byteorder.h> | ||
28 | #include <asm/memory.h> | ||
29 | #include <asm/arch/hardware.h> | ||
30 | |||
31 | /* | ||
32 | * ISA I/O bus memory addresses are 1:1 with the physical address. | ||
33 | */ | ||
34 | #define isa_virt_to_bus virt_to_phys | ||
35 | #define isa_page_to_bus page_to_phys | ||
36 | #define isa_bus_to_virt phys_to_virt | ||
37 | |||
38 | /* | ||
39 | * Generic IO read/write. These perform native-endian accesses. Note | ||
40 | * that some architectures will want to re-define __raw_{read,write}w. | ||
41 | */ | ||
42 | extern void __raw_writesb(void __iomem *addr, const void *data, int bytelen); | ||
43 | extern void __raw_writesw(void __iomem *addr, const void *data, int wordlen); | ||
44 | extern void __raw_writesl(void __iomem *addr, const void *data, int longlen); | ||
45 | |||
46 | extern void __raw_readsb(void __iomem *addr, void *data, int bytelen); | ||
47 | extern void __raw_readsw(void __iomem *addr, void *data, int wordlen); | ||
48 | extern void __raw_readsl(void __iomem *addr, void *data, int longlen); | ||
49 | |||
50 | #define __raw_writeb(v,a) (__chk_io_ptr(a), *(volatile unsigned char __force *)(a) = (v)) | ||
51 | #define __raw_writew(v,a) (__chk_io_ptr(a), *(volatile unsigned short __force *)(a) = (v)) | ||
52 | #define __raw_writel(v,a) (__chk_io_ptr(a), *(volatile unsigned int __force *)(a) = (v)) | ||
53 | |||
54 | #define __raw_readb(a) (__chk_io_ptr(a), *(volatile unsigned char __force *)(a)) | ||
55 | #define __raw_readw(a) (__chk_io_ptr(a), *(volatile unsigned short __force *)(a)) | ||
56 | #define __raw_readl(a) (__chk_io_ptr(a), *(volatile unsigned int __force *)(a)) | ||
57 | |||
58 | /* | ||
59 | * Bad read/write accesses... | ||
60 | */ | ||
61 | extern void __readwrite_bug(const char *fn); | ||
62 | |||
63 | /* | ||
64 | * Now, pick up the machine-defined IO definitions | ||
65 | */ | ||
66 | #include <asm/arch/io.h> | ||
67 | |||
68 | #ifdef __io_pci | ||
69 | #warning machine class uses buggy __io_pci | ||
70 | #endif | ||
71 | #if defined(__arch_putb) || defined(__arch_putw) || defined(__arch_putl) || \ | ||
72 | defined(__arch_getb) || defined(__arch_getw) || defined(__arch_getl) | ||
73 | #warning machine class uses old __arch_putw or __arch_getw | ||
74 | #endif | ||
75 | |||
76 | /* | ||
77 | * IO port access primitives | ||
78 | * ------------------------- | ||
79 | * | ||
80 | * The ARM doesn't have special IO access instructions; all IO is memory | ||
81 | * mapped. Note that these are defined to perform little endian accesses | ||
82 | * only. Their primary purpose is to access PCI and ISA peripherals. | ||
83 | * | ||
84 | * Note that for a big endian machine, this implies that the following | ||
85 | * big endian mode connectivity is in place, as described by numerious | ||
86 | * ARM documents: | ||
87 | * | ||
88 | * PCI: D0-D7 D8-D15 D16-D23 D24-D31 | ||
89 | * ARM: D24-D31 D16-D23 D8-D15 D0-D7 | ||
90 | * | ||
91 | * The machine specific io.h include defines __io to translate an "IO" | ||
92 | * address to a memory address. | ||
93 | * | ||
94 | * Note that we prevent GCC re-ordering or caching values in expressions | ||
95 | * by introducing sequence points into the in*() definitions. Note that | ||
96 | * __raw_* do not guarantee this behaviour. | ||
97 | * | ||
98 | * The {in,out}[bwl] macros are for emulating x86-style PCI/ISA IO space. | ||
99 | */ | ||
100 | #ifdef __io | ||
101 | #define outb(v,p) __raw_writeb(v,__io(p)) | ||
102 | #define outw(v,p) __raw_writew(cpu_to_le16(v),__io(p)) | ||
103 | #define outl(v,p) __raw_writel(cpu_to_le32(v),__io(p)) | ||
104 | |||
105 | #define inb(p) ({ unsigned int __v = __raw_readb(__io(p)); __v; }) | ||
106 | #define inw(p) ({ unsigned int __v = le16_to_cpu(__raw_readw(__io(p))); __v; }) | ||
107 | #define inl(p) ({ unsigned int __v = le32_to_cpu(__raw_readl(__io(p))); __v; }) | ||
108 | |||
109 | #define outsb(p,d,l) __raw_writesb(__io(p),d,l) | ||
110 | #define outsw(p,d,l) __raw_writesw(__io(p),d,l) | ||
111 | #define outsl(p,d,l) __raw_writesl(__io(p),d,l) | ||
112 | |||
113 | #define insb(p,d,l) __raw_readsb(__io(p),d,l) | ||
114 | #define insw(p,d,l) __raw_readsw(__io(p),d,l) | ||
115 | #define insl(p,d,l) __raw_readsl(__io(p),d,l) | ||
116 | #endif | ||
117 | |||
118 | #define outb_p(val,port) outb((val),(port)) | ||
119 | #define outw_p(val,port) outw((val),(port)) | ||
120 | #define outl_p(val,port) outl((val),(port)) | ||
121 | #define inb_p(port) inb((port)) | ||
122 | #define inw_p(port) inw((port)) | ||
123 | #define inl_p(port) inl((port)) | ||
124 | |||
125 | #define outsb_p(port,from,len) outsb(port,from,len) | ||
126 | #define outsw_p(port,from,len) outsw(port,from,len) | ||
127 | #define outsl_p(port,from,len) outsl(port,from,len) | ||
128 | #define insb_p(port,to,len) insb(port,to,len) | ||
129 | #define insw_p(port,to,len) insw(port,to,len) | ||
130 | #define insl_p(port,to,len) insl(port,to,len) | ||
131 | |||
132 | /* | ||
133 | * String version of IO memory access ops: | ||
134 | */ | ||
135 | extern void _memcpy_fromio(void *, void __iomem *, size_t); | ||
136 | extern void _memcpy_toio(void __iomem *, const void *, size_t); | ||
137 | extern void _memset_io(void __iomem *, int, size_t); | ||
138 | |||
139 | #define mmiowb() | ||
140 | |||
141 | /* | ||
142 | * Memory access primitives | ||
143 | * ------------------------ | ||
144 | * | ||
145 | * These perform PCI memory accesses via an ioremap region. They don't | ||
146 | * take an address as such, but a cookie. | ||
147 | * | ||
148 | * Again, this are defined to perform little endian accesses. See the | ||
149 | * IO port primitives for more information. | ||
150 | */ | ||
151 | #ifdef __mem_pci | ||
152 | #define readb(c) ({ unsigned int __v = __raw_readb(__mem_pci(c)); __v; }) | ||
153 | #define readw(c) ({ unsigned int __v = le16_to_cpu(__raw_readw(__mem_pci(c))); __v; }) | ||
154 | #define readl(c) ({ unsigned int __v = le32_to_cpu(__raw_readl(__mem_pci(c))); __v; }) | ||
155 | #define readb_relaxed(addr) readb(addr) | ||
156 | #define readw_relaxed(addr) readw(addr) | ||
157 | #define readl_relaxed(addr) readl(addr) | ||
158 | |||
159 | #define readsb(p,d,l) __raw_readsb(__mem_pci(p),d,l) | ||
160 | #define readsw(p,d,l) __raw_readsw(__mem_pci(p),d,l) | ||
161 | #define readsl(p,d,l) __raw_readsl(__mem_pci(p),d,l) | ||
162 | |||
163 | #define writeb(v,c) __raw_writeb(v,__mem_pci(c)) | ||
164 | #define writew(v,c) __raw_writew(cpu_to_le16(v),__mem_pci(c)) | ||
165 | #define writel(v,c) __raw_writel(cpu_to_le32(v),__mem_pci(c)) | ||
166 | |||
167 | #define writesb(p,d,l) __raw_writesb(__mem_pci(p),d,l) | ||
168 | #define writesw(p,d,l) __raw_writesw(__mem_pci(p),d,l) | ||
169 | #define writesl(p,d,l) __raw_writesl(__mem_pci(p),d,l) | ||
170 | |||
171 | #define memset_io(c,v,l) _memset_io(__mem_pci(c),(v),(l)) | ||
172 | #define memcpy_fromio(a,c,l) _memcpy_fromio((a),__mem_pci(c),(l)) | ||
173 | #define memcpy_toio(c,a,l) _memcpy_toio(__mem_pci(c),(a),(l)) | ||
174 | |||
175 | #define eth_io_copy_and_sum(s,c,l,b) \ | ||
176 | eth_copy_and_sum((s),__mem_pci(c),(l),(b)) | ||
177 | |||
178 | static inline int | ||
179 | check_signature(void __iomem *io_addr, const unsigned char *signature, | ||
180 | int length) | ||
181 | { | ||
182 | int retval = 0; | ||
183 | do { | ||
184 | if (readb(io_addr) != *signature) | ||
185 | goto out; | ||
186 | io_addr++; | ||
187 | signature++; | ||
188 | length--; | ||
189 | } while (length); | ||
190 | retval = 1; | ||
191 | out: | ||
192 | return retval; | ||
193 | } | ||
194 | |||
195 | #elif !defined(readb) | ||
196 | |||
197 | #define readb(c) (__readwrite_bug("readb"),0) | ||
198 | #define readw(c) (__readwrite_bug("readw"),0) | ||
199 | #define readl(c) (__readwrite_bug("readl"),0) | ||
200 | #define writeb(v,c) __readwrite_bug("writeb") | ||
201 | #define writew(v,c) __readwrite_bug("writew") | ||
202 | #define writel(v,c) __readwrite_bug("writel") | ||
203 | |||
204 | #define eth_io_copy_and_sum(s,c,l,b) __readwrite_bug("eth_io_copy_and_sum") | ||
205 | |||
206 | #define check_signature(io,sig,len) (0) | ||
207 | |||
208 | #endif /* __mem_pci */ | ||
209 | |||
210 | /* | ||
211 | * If this architecture has ISA IO, then define the isa_read/isa_write | ||
212 | * macros. | ||
213 | */ | ||
214 | #ifdef __mem_isa | ||
215 | |||
216 | #define isa_readb(addr) __raw_readb(__mem_isa(addr)) | ||
217 | #define isa_readw(addr) __raw_readw(__mem_isa(addr)) | ||
218 | #define isa_readl(addr) __raw_readl(__mem_isa(addr)) | ||
219 | #define isa_writeb(val,addr) __raw_writeb(val,__mem_isa(addr)) | ||
220 | #define isa_writew(val,addr) __raw_writew(val,__mem_isa(addr)) | ||
221 | #define isa_writel(val,addr) __raw_writel(val,__mem_isa(addr)) | ||
222 | #define isa_memset_io(a,b,c) _memset_io(__mem_isa(a),(b),(c)) | ||
223 | #define isa_memcpy_fromio(a,b,c) _memcpy_fromio((a),__mem_isa(b),(c)) | ||
224 | #define isa_memcpy_toio(a,b,c) _memcpy_toio(__mem_isa((a)),(b),(c)) | ||
225 | |||
226 | #define isa_eth_io_copy_and_sum(a,b,c,d) \ | ||
227 | eth_copy_and_sum((a),__mem_isa(b),(c),(d)) | ||
228 | |||
229 | #else /* __mem_isa */ | ||
230 | |||
231 | #define isa_readb(addr) (__readwrite_bug("isa_readb"),0) | ||
232 | #define isa_readw(addr) (__readwrite_bug("isa_readw"),0) | ||
233 | #define isa_readl(addr) (__readwrite_bug("isa_readl"),0) | ||
234 | #define isa_writeb(val,addr) __readwrite_bug("isa_writeb") | ||
235 | #define isa_writew(val,addr) __readwrite_bug("isa_writew") | ||
236 | #define isa_writel(val,addr) __readwrite_bug("isa_writel") | ||
237 | #define isa_memset_io(a,b,c) __readwrite_bug("isa_memset_io") | ||
238 | #define isa_memcpy_fromio(a,b,c) __readwrite_bug("isa_memcpy_fromio") | ||
239 | #define isa_memcpy_toio(a,b,c) __readwrite_bug("isa_memcpy_toio") | ||
240 | |||
241 | #define isa_eth_io_copy_and_sum(a,b,c,d) \ | ||
242 | __readwrite_bug("isa_eth_io_copy_and_sum") | ||
243 | |||
244 | #endif /* __mem_isa */ | ||
245 | |||
246 | /* | ||
247 | * ioremap and friends. | ||
248 | * | ||
249 | * ioremap takes a PCI memory address, as specified in | ||
250 | * Documentation/IO-mapping.txt. | ||
251 | */ | ||
252 | extern void __iomem * __ioremap(unsigned long, size_t, unsigned long, unsigned long); | ||
253 | extern void __iounmap(void __iomem *addr); | ||
254 | |||
255 | #ifndef __arch_ioremap | ||
256 | #define ioremap(cookie,size) __ioremap(cookie,size,0,1) | ||
257 | #define ioremap_nocache(cookie,size) __ioremap(cookie,size,0,1) | ||
258 | #define ioremap_cached(cookie,size) __ioremap(cookie,size,L_PTE_CACHEABLE,1) | ||
259 | #define iounmap(cookie) __iounmap(cookie) | ||
260 | #else | ||
261 | #define ioremap(cookie,size) __arch_ioremap((cookie),(size),0,1) | ||
262 | #define ioremap_nocache(cookie,size) __arch_ioremap((cookie),(size),0,1) | ||
263 | #define ioremap_cached(cookie,size) __arch_ioremap((cookie),(size),L_PTE_CACHEABLE,1) | ||
264 | #define iounmap(cookie) __arch_iounmap(cookie) | ||
265 | #endif | ||
266 | |||
267 | /* | ||
268 | * can the hardware map this into one segment or not, given no other | ||
269 | * constraints. | ||
270 | */ | ||
271 | #define BIOVEC_MERGEABLE(vec1, vec2) \ | ||
272 | ((bvec_to_phys((vec1)) + (vec1)->bv_len) == bvec_to_phys((vec2))) | ||
273 | |||
274 | /* | ||
275 | * Convert a physical pointer to a virtual kernel pointer for /dev/mem | ||
276 | * access | ||
277 | */ | ||
278 | #define xlate_dev_mem_ptr(p) __va(p) | ||
279 | |||
280 | /* | ||
281 | * Convert a virtual cached pointer to an uncached pointer | ||
282 | */ | ||
283 | #define xlate_dev_kmem_ptr(p) p | ||
284 | |||
285 | #endif /* __KERNEL__ */ | ||
286 | #endif /* __ASM_ARM_IO_H */ | ||